My 1983 Tork 2007 105-277v twist lock photocontrol
I got this off ebay anonymously for $4.99 plus shipping. Its in really perfect shape for the condition. This is my first vintage photocontroller in my collection! Plus its a instant response type.
Nice, it does look a lot like a 1980s Fisher Pierce. A word of warning, if you can help it avoid trying to open these up, the plastic on these cracks rather easily.